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SHOW()                           SQL Commands                           SHOW()

NAME
       SHOW - show the value of a run-time parameter

SYNOPSIS
       SHOW name
       SHOW ALL

DESCRIPTION
       SHOW  will  display  the  current setting of run-time parameters. These
       variables can be set using the SET  statement,  by  editing  the  post-
       gresql.conf  configuration  file,  through  the PGOPTIONS environmental
       variable (when using libpq or a libpq-based  application),  or  through
       command-line  flags when starting the postgres server. See in the docu-
       mentation for details.

PARAMETERS
       name   The name of a run-time parameter. Available parameters are docu-
              mented in in the documentation and on the SET [set(7)] reference
              page. In addition, there are a few parameters that can be  shown
              but not set:

              SERVER_VERSION
                     Shows the server's version number.

              SERVER_ENCODING
                     Shows the server-side character set encoding. At present,
                     this parameter can be shown  but  not  set,  because  the
                     encoding is determined at database creation time.

              LC_COLLATE
                     Shows  the  database's locale setting for collation (text
                     ordering). At present, this parameter can  be  shown  but
                     not  set,  because  the  setting  is determined at initdb
                     time.

              LC_CTYPE
                     Shows the database's locale setting for character classi-
                     fication. At present, this parameter can be shown but not
                     set, because the setting is determined at initdb time.

              IS_SUPERUSER
                     True if the current role has superuser privileges.

       ALL    Show the values of all configuration parameters,  with  descrip-
              tions.

NOTES
       The  function  current_setting  produces  equivalent output; see in the
       documentation.  Also, the pg_settings system  view  produces  the  same
       information.

EXAMPLES
       Show the current setting of the parameter DateStyle:

       SHOW DateStyle;
        DateStyle
       -----------
        ISO, MDY
       (1 row)

       Show the current setting of the parameter geqo:

       SHOW geqo;
        geqo
       ------
        on
       (1 row)

       Show all settings:

       SHOW ALL;
                     name              |            setting             |                                         description
       --------------------------------+--------------------------------+----------------------------------------------------------------------------------------------
        add_missing_from               | off                            | Automatically adds missing table references to FROM clauses.
        allow_system_table_mods        | off                            | Allows modifications of the structure of system tables.
           .
           .
           .
        work_mem                       | 1024                           | Sets the maximum memory to be used for query workspaces.
        zero_damaged_pages             | off                            | Continues processing past damaged page headers.
       (146 rows)

COMPATIBILITY
       The SHOW command is a PostgreSQL extension.

SEE ALSO
       SET [set(7)], RESET [reset(l)]

SQL - Language Statements         2009-12-09                            SHOW()

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